Escape-valve for water-closet flushing-tanks.



No. &33,041 PATBNTED MAR. 24, 1908 u. & E. G. PFAU. ESGAPE MLVE FORWATER CLOSET FLUSHING TANKS'.

APPLICATION PILED NOV. 22, 1906,

UNITED STATESPATENT OFFICE.

y fa'll whomitmq y concern:

it'knowrthatwe, CHARLES PFAU and fEnwA D G'PFA'; citizens of the UnitedStates residing at Cincinnati` in the County of'Haiiilton and State ofOhio, have invented certain' new and useful Improvenents inEscape-Valves for WatenCloset Flushing-Tanks, of which the following isa an escape valve for water closet specification. p y

The object of our invention is to rovide ushing tanks of simple andeconomical construction and which causes the maximum drainage ordischarge of the tank, and our nvention consists in the combination andarrargement of parts hereinafter described and claimed.

In the drawings: Figure 1 is a vertical 'section of a water closetflushing tenk showing an escape valve embodying our invention: Fig. 2,an enlarged section through the valve; Fig. 3, an enlarged sectionthrough the ball of the valve; and Fig. 4, a section of a modified formof ball.

The valve seat consists of` a cylindrical tube or pipe A adapted to passthrough the bottom of tank B and Secured in position by a nut C. Thebore or discharge opening of pipe A is substantially cylindricalthroughout and its upper edges a are rounded of just enough to supportball D without cutting it. Ball D is made of rubber or similar flexiblematerial and is of a size to fit well within the mouth of pipe A, theline of contact being well up toward the middle of the ball, as shown.surrounding the ball at or near its middle is a project-ing rib orfiange ti which serves to stiifen the ball against collapsing and alsoacts as a stop to prevent passage of the ball through the valve seat incase of partial collapse or distortion. To further strengthen the ballwe provide a vertical connecting piece d which serves to preventdistortions of the ball. At one side the valve seat is provided with acasing E having the ort e communicating therewith, and carrying theusual overflow pipe F.

Owing to the fact that the ball D has only substantially a line contactwith the edges of valve seat A, and that the ball is strengthened andstiffened against collapsing or distorting by rib d and connecting pieced we are enabled to construct the valve seat to.

have but a small elevation above the bottom of tank B. Inasmuch as thedischarge from tank is limited by the height of the valveGHARLES7PFA%ANDLEDWRD arr m or CINCINNATI, orno, ASSIGNORSTO 'THE PFAU`Manumerenme.,comuna OFINCINNATI, orno, A CORPORATION OF VOHIO.

:istikamet-m FoR WATEB-CLOSET FLUsHING-TANKs,

, L ilspecificationofLetters Patent. i ?atentati March 24:, 198;

i hpplieation filed*November22,1906. Seria1No.344,565." w

Construction of the valve ball in which the vertical connecting piece isdispensed With, but the rib d is retained to strengthen and stiffen it.I

Copending application Serial #334236 sets forth and claims a float valvecomprising a hollow fiexible rubber ball with a stay formed integraltherein to hold the surface of said ballin its normal shape and thatconstruction is not claimed in this application.

XVhile we have illustrated and described the preferred Construction forcarrying our 'invention into effect, this may be varied withoutdeparting from the spirit of the invention. We therefore do not wish tobe limited to the exact Construction set forth but hat we claim as newand desire to secure by Letters Patent is:

l. In an escape valve for water closet flushing tanks, the combinationof a flexible Valve ball. provided with an exterior strength ening ribat or near its middle and an interior vertical connecting piece disposedat right angles to said strengthening rib, with a valve seat consistingof the upper end of an open pipe, substantially as set forth. v

2. In an escape valve for water closet flushing tanks, the combinationof valve seat A consisting of the upper end of an open pipe of adiameter somewhat smaller than said ball and having rounded edges a,With flexible valve ball D having afiexible exterior strengthening rib dform ed integral therewith and upon the outer surface thereof and inaddition thereto to stifl'en the ball against collapsing, and adapted toengage said valve seat and serve as a stop in case of partial collapseof the ball, substantially as set forth.

In an escape valve for water closet flushing tanks, the combination of aflexibl valve 'ball provided with an exterior strengthening rib at ornear'its middle and 'an interior vertical connecting piece disposed at'right eagles to said stre e upper end of an t open ppe and havnl'substantiallye line contact with seid ba stantialy as set forth.

4. an escape valve for water closet tanks, the combination of 'vlve seatA having rounded edges' a With fiexible valve ball D havin exteriorstrengthenng rib d formed int'egra therewith and upon the outer surfacethereof, and adapted to engage said`valve seat and serve as e stop, andinterior connecting piece d substantially. as set Earth SQA valve ballfor water closet fiushing below the rib, 'subbanks consisting of aflexible bell D having e, flexible exterior strengthem'ng rib d near itsmiddle-formed integral therewith upon &83,047

the outer surface thereof to stifi'en the ball against collapsing, andadapted to engage 20 seid valve seat and serve es a stop in case ofpartial Collapse of the ball, substantially as set forth and for thepurposes specified.

6. A valve ball for water closet fiushng .tanks consisting of &flexibleball D having 25- an exterior strengthening' rib d at or near its middleformed integral therewith and upon v the outer surface thereof, andadapted to engage a, .va-Iva seatand serve as a stop, and an interierconnecting piece d substantially as 30 set forth and for the p osesspecified.

' C LES PFAU. EDWARD G. PFAU. witnesses:

JAMES N. RAMSEY, H. SCHUMAGHER

